KdV方程的新精确孤波解

采用一种辅助方程的方法给出KdV方程的精确孤波解.这种方法也可用于寻找其他非线性演化方程的孤波解.     

一个（3＋1）-维KdV方程的精确解

通过应用双线性导数方法得到一个(3+1)-维KdV方程的N孤子解,利用Wronskian技巧该方程的Wronskian解形式也被得到.     

关于广义KdV方程的孤波解

给出了广义ＫｄＶ方程：ｕｔ＋ｔｘｘｘ＋（ｕ＾ａ）ｘ＝０。     

关于广义KdV方程的孤波解

给出了广义KdV方程ut＋u（xxx）十（ua）x＝0的孤波解．     

KdV方程的新孤波解

借助Mathematica计算机代数系统。采用双函数法和吴文俊法元法，获得了KdV方程的多级新的孤波解，进一步补充和完善子双函数法。     

一个非等谱方程的Wronskian形式的混合解

N-soliton solutions in the Wronskian form for the KdV equation with loss and nonuniformity terms were obtained. New rational-like solutions and mixed solutions were further derived. All these solutions were verified by direct substitutions into bilinear equation.     

5阶KdV方程的一类新多孤子解

Using bilinear transformation method,a new N-soliton solutions were obtained for the Sawada-Kotera equation.     

（3＋1）维KP方程的Wronskian解

本文通过构造Wronskian行列式,并利用行列式的性质通过复杂的计算证明该Wronskian行列式满足给出的双线性导数方程,进一步给出孤子方程的Wronskian解。     

带源的KdV方程的双线性Bacldund变换及多孤立子解

我们首先利用一些双线性算子恒等式构造出带源的KdV方程的双线性Backlund变换，然后利用Hirota双线性方法得到带源的KdV方程的多孤立子解。     

KdV方程的Darboux变换

分析了标准Ｄａｒｂｏｕｘ变换方法用于ＫｄＶ方程时遇到的困难,然后利用同一个ＫｄＶ方程的两个不同的Ｌａｘ表示,导出了ＫｄＶ方程Ｄａｒｂｏｕｘ变换。利用该变换就可以递推导出所有孤子解。     

微分差分KdV方程新的类多孤子解

This article is concerned with the Hirota direct method for studying novel multisoliton solutions of the discrete KdV equation.First the Hirota method was introduced,then the novel multisoliton solutions were obtained.Simultaneously the figures of the novel one-soliton solution and two-solton solution were given and the singularity of the novel multisoliton solutions was discussed.Finally it was pointed out that the multisoliton solutions with sigularity can be called soliton-like solutions.     

Solutions for non-isospectral variable coefficient KdV equation

By bilinear approach we derive N-soliton-like solutions for a variable coefficient KdV equation with some x-dependent coefficients. This equation can be considered as a non-isospectral variable coefficient KdV equation. Solutions in Hirota’s form and Wronskian form are given, respectively.     

Novel Solutions of MKdV Equation with the Modified Baecklund Transformation

AA modified version of the bilinear Baecklund transformation for the MKdV equation was given, with which some new solutions of the MKdV equation are obtained. The approach used here is general and can be applied to other soliton equations.     

变系数KdV方程的孤子解

利用特殊的截断展开方法求出了变系数KdV方程的孤子解．其基本思想是假定该方程的形式解具有截断展开形式，以致可把变系数KdV方程转化为一组待定函数的方程组．进而给出待定函数容易积分的常微分方程。     

耦合KdV方程的微扰孤子解

对于两个具有任意非零色散系数的弱耦合Korteweg-deVries（KdV）方程,得到一类微扰孤子解及其存在性条件．数值结果表明,弱耦合相互作用仅给未扰孤子对以小的修正,不改变孤子的特性．     

(2+1)维变系数KdV方程的新精确解

利用方程代换思想,对广义Riccati方程作变系数多项式展开,获得了(2 1)维变系数KdV方程的多种新精确解.相应地,亦得到近轴KdV方程的新精确解.     

一个三维孤立子方程的Bcklund变换

研究了一个三维的孤立子方程的Backlund变换(BT)和非线性叠加公式,证明了文[3,4]中的三维的Backlund变换可以分解成三个二维的Backlund变换,并讨论了一些与N维Liouville方程有关的问题。     

组合KdV方程的齐次平衡法求解

利用齐次平衡方法研究了组合KdV方程ut auux 6u^2ux uxxx=0的孤波解结构，并给出了它的扭结型孤波解。